I am in the process of raising my canopy so I don't have to raise and lower my tower every day. I am going to sew "curtains" onto the side of the current canopy to keep the rain/sun out. My current canopy is not canvas. It is some kind of plasticized fabric, almost like a tarp. Does anyone know what that material is called, or who a likely manufacturer would be? I don't necessarily need it to be water proof as the canopy top will handle the brunt of the weather, just need it to stop the blowing rain and block out some rain.